Fohhn MA-4.100 Manual
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Fohhn MA-4.100 Manual

Dsp power amplifier
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Manual
MA-4.100
MA-4.600
MA-2.1200
DSP power amplifiers
1
25.07.2024

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Summary of Contents for Fohhn MA-4.100

  • Page 1 Manual MA-4.100 MA-4.600 MA-2.1200 DSP power amplifiers 25.07.2024...

  • Page 2: Table Of Contents

    Contact address ..................................31 Important safety instructions Please read and observe these safety instructions and all other instructions relating to your Fohhn products before using or installing them. Always keep the instructions in the vicinity of the devices. Reading these instructions is no substitute for knowing and observing the applicable national safety regulations and standards and complying with safe working practices on site.

  • Page 3: Explanation Of Terms

    To avoid possible hearing damage, never stand in the immediate vicinity of the system Warning! when it is in operation. Keep a distance of more than 5 meters from powerful Fohhn systems, but also at least 1 meter from smaller systems for the near field or small indoor spaces.

  • Page 4: Electrical Safety Instructions

    Electrical safety instructions All Fohhn products that are or contain Fohhn power amplifiers are devices of protection class 1. They are built and certified in accordance with the VDE safety measures for electronic devices and leave our factory in a technically safe condition. The devices comply with all currently valid EMC directives: This is confirmed by the affixed CE marking.

  • Page 5: Storage And Transportation

    Thanks to the integrated FOHHN AUDIO DSP, the power amplifiers can be networked, remote-controlled and remote-monitored. With a single control software, FOHHN AUDIO SOFT, you have access to all DSP functions and presets. (The latest version of the software is available for free download at www.fohhn.com).

  • Page 6: Scope Of Delivery

    At least 1U must be left free at the top and bottom between rack-mounted amplifiers. Each device is supplied with two mounting brackets (mounting bracket set). An optional 19" rack connector, article 8022-00000, is available for mounting two Fohhn 9.5" devices next to each other in a 19" rack. 25.07.2024...
  • Page 7 An optional 19" mounting bracket with 6 holes for Neutrik D series sockets is available for mounting an MA-Series amplifier in a 19" rack. Fohhn article 8023-00000. 25.07.2024...

  • Page 8: Connection Instructions And Operating Elements

    The MA-SERIES power amplifiers are equipped with a USB-C socket on the front of the housing. This enables optional, direct configuration of the device using a PC and FOHHN AUDIO SOFT control software without using a network. To connect a network of several devices, the devices must be connected to an Ethernet network via the RJ45 socket (2).

  • Page 9: Status Displays

    You can remotely control and monitor the functions of the digital signal processors (DSPs) integrated in your FOHHN power amplifier via the Ethernet network. To do this, you need a Windows PC with FOHHN AUDIO SOFT control software (version 6.2.2 or later) installed.
  • Page 10 Confirm the entry with Ok: The FOHHN power amplifier now receives the newly assigned ID. You can also change the ID of a FOHHN power amplifier at any time during operation. To do this, the system must be in FOHHN-NET. Proceed as follows: Open the device list via the button of the same name in the toolbar or via the View menu.

  • Page 11: Loading The Speaker Presets

    Updating the firmware In addition to FOHHN AUDIO SOFT, the firmware of your devices and the speaker database determine the range of functions of your FOHHN system. There will be updates for these data sets from time to time, which you can download within FOHHN AUDIO SOFT (Internet connection required!).
  • Page 12 Wiring a MA-SERIES power amplifier via the Dante input 25.07.2024...

  • Page 13: Integration Into A Dante™ Network

    Power amplifiers with a Dante™ interface are connected to the Dante™ audio network via an Ethernet switch. The MA-Series power amplifier is controlled via this network or via the USB socket. In addition to FOHHN AUDIO SOFT, the software Dante Controller from Audinate is required for control on the PC (see section 3.3.3 "FOHHN-NET cabling and ID assignment"...
  • Page 14 All parameters of the Dante™ Input Interface (e.g. audio routing within a Dante network) must be configured using the Dante Controller software. Firmware update of the Dante™ interface To update the Dante firmware of the interface, the software Dante Controller 4.2 or newer is required. You can download this software from the Audinate website: https://www.audinate.com/products/software/dante-controller Carry out the update as follows:...

  • Page 15: Rename Device And Output Channels

    In the LIBRARY section, you have the option of saving the Fohhn Dante firmware locally on your PC, so that an update is possible even without an Internet connection. The Dante Updater only updates the firmware of the integrated Dante module - the firmware of the FOHHN device is independent of this and may need to be updated separately! Here you will find all operating instructions for Dante™...
  • Page 16 25.07.2024...

  • Page 17: Inputs

    The signals from the power amplifier are connected to the 4 output terminals. The loudspeakers are connected here. In addition, output channels 1 to 4 are routed to 4 Dante output channels after the Fohhn DSP output processing but before the Speaker DSP.

  • Page 18: Speaker Presets

    SPEAKER PRESETS The use of FOHHN speaker presets ensures, among other things, that no audible distortion can occur within the FOHHN DSP. ANALOG INPUTS When using analog input signals, special care must be taken with regard to the level. The conversion between analog and digital audio signals always requires a definition for 0 dBFS.
  • Page 19 Example 2 Input level too low; high input gain also amplifies the noise Example 3 Too high a level leads to clipping. Audible distortion cannot be prevented afterwards by lowering the level! Example 4 An incorrect gain structure leads to a loss of signal quality, the noise level is increased! Example 5 Optimum level for good signal quality and sufficient reserve for peaks 25.07.2024...

  • Page 20: Matrix Functions And Dsp Routing

    Matrix functions and DSP routing The MA-4.100 contains a 4 x 4 routing matrix in which all 4 input channels can be mixed to all 4 output channels with variable gain. Each of the 16 nodes contains the function Gain +12 dB ... -80dB, mute and polarity 1 / -1.

  • Page 21: Further Functions

    individually, separately for each output, with a routing gain. Four input channels are mixed to four output channels. The mix level of each input can be adjusted individually, separately for each output, with a routing gain. Further functions Auto Power Save The MA-SERIES power amplifiers have a configurable mode at to save energy and extend the service life of the device.
  • Page 22 In addition, the noise is completely suppressed during pauses. How to set the Auto Power Save mode in FOHHN AUDIO SOFT: In the Device list view, select one or more output stages from and right-click to open the context menu.
  • Page 23 This switching contact can be configured as a changeover switch in FOHHN AUDIO SOFT: Select one or more output stages in the Device list view and call up the context menu by clicking the right mouse button.
  • Page 24 The MA-SERIES power amplifiers and their settings can be password-protected against subsequent changes. You can set this password lock via FOHHN AUDIO SOFT. Further information about the password lock can be found in section 6.6 "Password lock" in the separate FOHHN AUDIO SOFT operating instructions. You can download these from the Fohhn website: www.fohhn.com...

  • Page 25: Technical Data

    Dynamic range >120 dB Remote control Fohhn-Net over Ethernet, USB-C, Fohhn Audio Soft Remote monitoring Temperature, Protect, Power Supply, Fohhn-Net, Fohhn Audio Soft Switching contact Load preset, standby on/off Password protection Auto Power Save yes, time adjustable 1 s to 12 h, or never active...
  • Page 26 Temperature range 0 - 40°C Cooling Temperature-controlled fan Weight 1.2 kg 5.2 kg 1 U / 1/2 19″, 211 x 45 x 170 1 U / 19″, 440 x 45 370 mm Dimensions (W x H x D) 25.07.2024...
  • Page 27 Controller Digital signal processors Independent limiters Selective bass/mid/high 3-band limiting Band-specific time constant Filter technology 80-bit double precision Entrance Analog or Dante Input DSP processing FIR filter Input Gain -80 dB - +12 dB Routing Gain -80 dB - +12 dB Output gain -80 dB - +12 dB 8 x 10 fully parametric filters each...
  • Page 28 Signal to noise ratio > 108 dB/A Input impedance 10 kOhm Latency 1.0 ms 25.07.2024...
  • Page 29 Input Interface (Dante) Inputs 1 x RJ-45 100BASE-T Ethernet, Dante, 4 x 48kHz Latency Dante +0.6 ms Output option (terminal) Outputs 1 x Phoenix 8-pin 1 x Phoenix 8-pin 1 x Phoenix 4-pin Conductor cross-section max. 3.3 mm² flexible, 3.3 mm² rigid Displays (front) Ready LED blue = power on, flashing blue = signal...

  • Page 30: Troubleshooting

    Change the ID - no ID may appear by FOHHN AUDIO SOFT. FOHHN-NET ID. twice (see 3.3.4 "Fohhn-Net cabling (An ID conflict is displayed in FOHHN and ID assignment"). AUDIO SOFT). The ID search area is restricted. Extend the search range from ID 1 to 254.

  • Page 31: Service And Repair

    Do not service or repair the appliance. For the address of a Fohhn service center near you, please contact the address given on the previous page. Keep the packaging of the devices so that you can send them in their original packaging in the event of damage.

This manual is also suitable for:

Ma-4.600Ma-2.1200

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